title: Modeling preparation condition and composition-activity relationship of perovskite-type LaxSr1-xFeyCo1-yO3 nano catalyst.
abstract: In this paper, an artificial neural network (ANN) is first applied to perovskite catalyst design. A series of perovskite-type oxides with the LaxSr1-xFeyCo1-yO3 general formula were prepared with a sol-gel autocombustion method under different preparation conditions. A three-layer perceptron neural network was used for modeling and optimization of the catalytic combustion of toluene. A high R2 value was obtained for training and test sets of data: 0.99 and 0.976, respectively. Due to the presence of full active catalysts, there was no necessity to use an optimizer algorithm. The optimum catalysts were La0.9Sr0.1Fe0.5Co0.5O3 (Tc=700 and 800 °C and [citric acid/nitrate]=0.750), La0.9Sr0.1Fe0.82Co0.18O3 (Tc=700 °C, [citric acid/nitrate]=0.750), and La0.8Sr0.2Fe0.66Co0.34O3 (Tc=650 °C, [citric acid/nitrate]=0.525) exhibiting 100% conversion for toluene. More evaluation of the obtained model revealed the relative importance and criticality of preparation parameters of optimum catalysts. The structure, morphology, reducibility, and specific surface area of catalysts were investigated with XRD, SEM, TPR, and BET, respectively.
authors.affiliation: Department of Applied Chemistry and Chemical Engineering, Faculty of Chemistry, University of Tabriz , Tabriz, Iran.
authors.forename: Samira Arefi
authors.initials: SA
authors.lastname: Oskoui
authors.forename: Aligholi
authors.initials: A
authors.lastname: Niaei
authors.forename: Hui-Hsin
authors.initials: HH
authors.lastname: Tseng
authors.forename: Dariush
authors.initials: D
authors.lastname: Salari
authors.forename: Behrang
authors.initials: B
authors.lastname: Izadkhah
authors.forename: Seyed Ali
authors.initials: SA
authors.lastname: Hosseini
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D002384:Catalysis; D016571:Neural Networks, Computer; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D044367:Phase Transition; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014050:Toluene / Q000737:chemistry
chemical_list: D017610:Calcium Compounds; D010087:Oxides; C059910:perovskite; D014050:Toluene; D014025:Titanium